---
title: "21L.B.142 Registration of a declaration of production capability — Annex Ib, Initial Airworthiness · Avioverse"
description: "The competent authority shall register the declaration of production capability on a suitable database, including the declared scope of work, provided…"
url: "https://avioverse.aero/regulations/easa/initial-airworthiness/annex-ib/section-b-procedures-for-competent-authorities/21l-b-142"
---

# 21L.B.142 Registration of a declaration of production capability

Annex Ib · Regulation (EU) No 748/2012 · EAR revision 27 Nov 2025

IR Implementing rule

## 21L.B.142 Registration of a declaration of production capability

The competent authority shall register the declaration of production capability on a suitable database, including the declared scope of work, provided that:

(a) the declarant has declared their capability in accordance with point 21L.A.123;

(b) the declarant has made a commitment that the obligations in accordance with point 21L.A.127 will be undertaken;

(c) there are no unresolved issues in accordance with point 21L.B.141.

IR · 21L.B.142 — Regulation (EU) No 748/2012 · Regulation (EU) 2022/1361 · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

AMC Acceptable means of compliance

## AMC1 21L.B.142 Registration of a declaration of production capability

REGISTRATION NUMBER

The competent authority should assign a unique and consecutive declared production organisation (DPO) reference number to the declarant.

The reference number should have the following format: commencing with the UN country code of the State of the competent authority to which the declaration is submitted, followed by the term ‘.DPO.’ and a consecutive numbering (example: ‘AT.DPO.001’).

AMC · AMC1 21L.B.142 — Regulation (EU) No 748/2012 · ED Decision 2023/013/R · Initial Airworthiness Easy Access Rules · EAR revision 27 Nov 2025

[All rules in SECTION B - PROCEDURES FOR COMPETENT AUTHORITIES](https://avioverse.aero/regulations/easa/initial-airworthiness/annex-ib/section-b-procedures-for-competent-authorities)

Consolidated from the EASA Easy Access Rules (revision 27 Nov 2025, extracted 13 Oct 2026) for convenience. Not the official publication — verify against the Official Journal of the European Union and the EASA publications before operational use.